Unbiquadium (Ubq)
SuperactinideMasse atomique relative standard
N/DConfiguration électronique
[Og] 5g⁴ 8s²Point de fusion
N/DPoint d’ébullition
N/DMasse volumique
N/DÉtats d’oxydation
N/DÉlectronégativité (Pauling)
N/DÉnergie d’ionisation (1re)
N/DAnnée de découverte
N/DRayon atomique
N/DUnbiquadium is the temporary systematic name for the undiscovered element with atomic number 124. It would be a superheavy element beyond the known periodic table and is treated entirely as a predicted nuclide family, not as an isolated material. Nuclear models place possible longer-lived isotopes near the proposed island of stability, but no isotope of element 124 has been confirmed experimentally.
This element has not been synthesized or experimentally confirmed. All listed physicochemical properties are calculated, extrapolated, or model-dependent.
No macroscopic sample of unbiquadium exists, and even individual atoms have not been confirmed. Its color, density, melting point, and other bulk properties are therefore unknown; published values, where given, are theoretical predictions only.
Unbiquadium has no commercial, medical, industrial, or routine laboratory use. A confirmed isotope would be useful only for basic research in nuclear structure, superheavy-element synthesis, and tests of relativistic electronic-structure theory. Any such work would involve atom-at-a-time production and detection rather than handling of a usable elemental material.
No compounds of unbiquadium have been prepared or observed. Its chemistry is therefore computational and uncertain, especially because relativistic effects are expected to influence the ordering and participation of 8s, 8p, 7d, and 5g electrons. Model studies may discuss possible oxidation states and bonding to fluoride or oxide ligands, but specific stoichiometries and chemical stability have not been experimentally established.
The safety properties of unbiquadium are not known from direct handling. Any isotope that might be produced would be radioactive and would likely decay by alpha emission, spontaneous fission, or related nuclear processes, depending on the isotope. In practice the principal hazards would come from accelerator operations, radioactive targets, activation products, and decay radiation rather than from chemical toxicity of bulk unbiquadium.
Unbiquadium has no confirmed natural occurrence and no known environmental cycle. If atoms were produced in a laboratory, they would be formed in extremely small numbers and would decay before ordinary transport, deposition, or bioaccumulation could be observed. Environmental behavior such as solubility, speciation, and sorption is therefore unknown.
Unbiquadium has no commodity market, no practical supply chain, and no recoverable source. Possible production would require heavy-ion fusion experiments using rare, highly radioactive actinide targets and intense accelerator beams, followed by decay-chain identification of single atoms. Such experiments are limited by target availability, beam time, small reaction cross sections, and difficult background rejection, not by conventional mining or refining economics.
No unbiquadium has been detected in nature or in extraterrestrial material. If nuclei with atomic number 124 are ever formed in extreme nucleosynthetic events, they are expected to be rare and unstable on cosmic timescales unless an unusually long-lived isotope exists. Its cosmic abundance is therefore presumed negligible.
- Unbiquadium is a placeholder IUPAC systematic name, not a discovery claim.
- No isotope of element 124 has been accepted as synthesized.
- Predictions for its chemistry are especially sensitive to relativistic electron effects.
- A single confirmed decay chain could be scientifically important even without a visible sample.
- Element 124 is often discussed in relation to the proposed superheavy island of stability.
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Propriétés
Propriétés physiques
N/D
Propriétés chimiques
- Affinité électronique
- 0,4 eV
- Configuration électronique
- [Og] 5g⁴ 8s²
Propriétés thermodynamiques
N/D
Propriétés nucléaires
- Protons
- 124 Comparer : Protons de tous les éléments →
- Isotopes connus
- 0 Comparer : Isotopes connus de tous les éléments →
- Isotopes stables
- 0 Comparer : Isotopes stables de tous les éléments →
- Présence à l’état naturel
- Non observé
Abondance
N/D
Sécurité
- Radioactif
- Oui
Structure cristalline
N/D
Structure électronique
- Électrons par couche
- 2, 8, 18, 32, 36, 18, 8, 2 Comparer : Électrons par couche de tous les éléments →
Identifiants
- Numéro CAS
- 54576-75-9 Comparer : Numéro CAS de tous les éléments →
Configuration électronique Prédit
——Données de configuration électronique indisponibles pour cet ion.
Modèle atomique
Les isotopes diffèrent par leur nombre de neutrons, leur masse et leur stabilité — pas par la configuration électronique de l’atome neutre.
N/D
Modèle atomique schématique, non à l’échelle.
Empreinte atomique
Spectre d’émission / d’absorption
Distribution isotopique
Aucun isotope stable.
| Nombre de masse | Masse atomique (u) | Abondance naturelle | Demi-vie |
|---|
Phase / État
Données de phase ou d’état indisponibles
N/D
Données de phase ou d’état indisponibles